Προς το παρόν δεν βλέπω μεγάλη βελτίωση, αλλά τουλάχιστον δεν έχω πια ναυτία.

Yes. Προς το παρόν is a very common fixed expression meaning for now, for the time being, or at the moment.

Literally, προς means toward and το παρόν means the present, so the phrase originally means something like toward the present time, but learners should treat it as an idiom.

Examples:

• Προς το παρόν μένω εδώ. = For now I’m staying here.
• Προς το παρόν δεν ξέρουμε. = For the moment we don’t know.

In Greek, just like in English, to see can be used metaphorically to mean to notice, to observe, or to detect.

So δεν βλέπω μεγάλη βελτίωση does not mean you are literally looking at improvement with your eyes. It means:

• I don’t see much improvement
• I’m not noticing much improvement

This is a very natural way to say it in Greek.

Similar examples:

• Δεν βλέπω διαφορά. = I don’t see a difference.
• Βλέπω πρόοδο. = I see progress.

Βελτίωση means improvement and it is a feminine noun.
Μεγάλη means big / great / much and agrees with βελτίωση in gender, number, and case.

So:

• βελτίωση = feminine singular
• μεγάλη = feminine singular form of μεγάλος

In this sentence, μεγάλη βελτίωση is the direct object of βλέπω, so it is in the accusative. For this particular feminine noun/adjective pattern, the accusative singular looks the same as the nominative singular, so you see:

• μεγάλη βελτίωση

Because the phrase is indefinite here. It means a big improvement or more naturally much improvement / significant improvement, not the big improvement.

Compare:

• Δεν βλέπω μεγάλη βελτίωση. = I don’t see much / significant improvement.
• Δεν βλέπω τη μεγάλη βελτίωση που περίμενα. = I don’t see the big improvement I expected.

Greek often omits the article when speaking in a general or indefinite way like this.

Yes. Δεν is the standard negation used with verbs in the indicative mood.

So:

• βλέπω = I see
• δεν βλέπω = I do not see
• έχω = I have
• δεν έχω = I do not have

In normal speech, δεν is often pronounced more lightly before some sounds, and you may also see δε in less formal writing, but δεν is the standard full written form.

Τουλάχιστον means at least.

In this sentence:

• αλλά τουλάχιστον δεν έχω πια ναυτία = but at least I don’t have nausea anymore

It often appears before the part of the sentence it modifies, but Greek word order is fairly flexible. Still, this placement is very natural.

Examples:

• Τουλάχιστον προσπάθησα. = At least I tried.
• Δεν έγινε αυτό, αλλά τουλάχιστον μάθαμε κάτι. = That didn’t happen, but at least we learned something.

Here πια means anymore / no longer.

So:

• δεν έχω πια ναυτία = I don’t have nausea anymore

It is commonly used with negation to express that something used to be true, but is not true now.

Examples:

• Δεν μένω πια εκεί. = I don’t live there anymore.
• Δεν τον βλέπω πια. = I don’t see him anymore.

Without negation, πια can sometimes have a different nuance depending on context, so learners most often first meet it in negative sentences like this one.

Often yes. Πλέον can also mean anymore / now / by now / no longer, depending on context.

So:

• Δεν έχω πια ναυτία.
• Δεν έχω πλέον ναυτία.

Both are possible and natural.

That said, πια is extremely common in everyday speech and often sounds a bit more conversational. Πλέον can sound slightly more formal or neutral in some contexts.

In Greek, the normal way to express physical symptoms is often with έχω (I have).

So:

• έχω ναυτία = I have nausea / I feel nauseous
• έχω πονοκέφαλο = I have a headache
• έχω πυρετό = I have a fever

Greek does not usually use to be here the same way English does in I am nauseous. Instead, Greek commonly says I have nausea.

Because ναυτία is being used as an uncountable condition or symptom, similar to how English says I have nausea rather than I have a nausea.

So:

• έχω ναυτία = I have nausea
• δεν έχω πια ναυτία = I don’t have nausea anymore

If you added an article, it would usually sound more specific or less natural in this kind of basic symptom statement.

Not completely. Greek word order is more flexible than English word order, because endings carry a lot of grammatical information.

The given sentence is very natural:

• Προς το παρόν δεν βλέπω μεγάλη βελτίωση, αλλά τουλάχιστον δεν έχω πια ναυτία.

You may hear slight variations for emphasis, such as:

• Προς το παρόν μεγάλη βελτίωση δεν βλέπω... This gives extra emphasis to μεγάλη βελτίωση.

But for learners, the original version is the safest and most neutral.

Because the speaker is describing their current situation.

• δεν βλέπω μεγάλη βελτίωση = I don’t see much improvement (right now)
• δεν έχω πια ναυτία = I no longer have nausea (now)

Greek present tense often covers what English also expresses with the simple present in statements like this.

A rough pronunciation guide is:

PROS to pa-RON den VLE-po me-GA-li vel-TI-o-si, a-LA tu-LA-hi-ston den E-ho PYA nav-TI-a.

A few stress points:

• παρόν → stress on the last syllable
• βλέπω → stress on βλε-
• μεγάλη → stress on γά
• βελτίωση → stress on τί
• τουλάχιστον → stress on λά
• έχω → stress on έ
• πια is one syllable
• ναυτία → stress on τί

The υ in ναυτία combines with α to form the sound sequence -tia, so ναυτία sounds roughly like nav-TI-a.

As an English translation, yes, that sounds natural. But grammatically in Greek, the original sentence is perfectly standard and natural as written.

A speaker is essentially saying:

• For now, I don’t see much improvement, but at least I don’t have nausea anymore.

In smoother English, people often translate the second part as:

• ...but at least I’m not nauseous anymore.

That is a good natural translation, even though the Greek literally says I don’t have nausea anymore.